Results 21 to 30 of about 3,284,055 (141)
Force Analysis of Logging Cable in Deep Well
Journal of Physics: Conference Series, 2021 AbstractWith the increase of deep wells, high temperature and high pressure wells and complex wells, the demand for logging is also increasing. Wireline logging is an important technical means to obtain downhole data in the process of petroleum testing.
Wenzhe Zhang +4 more
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Low-ionization structures in planetary nebulae - I: physical, kinematic and excitation properties
, 2015 Though the small-scale, low-ionization knots, filaments and jets (LISs) of planetary nebulae (PNe) are known for ~30yr, some of their observational properties are not well established.
Akras, Stavros, Gonçalves, Denise R.
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Geophysical well logging operations and log analysis in Geothermal Well Desert Peak No. B-23-1 [PDF]
, 1980 Geothermal Well Desert Peak No. B-23-1 was logged by Dresser Atlas during April/May 1979 to a total depth of 2939 m (9642 ft). A temperature of 209/sup 0/C (408/sup 0/F) was observed on the maximum thermometer run with one of the logging tools. Borehole tools rated to a maximum temperature of 204.4/sup 0/C (400/sup 0/F) were utilized for logging except
Sethi, D. K., Fertl, W. H.
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Bayesian Model Selection Based on Proper Scoring Rules
, 2015 Bayesian model selection with improper priors is not well-defined because of the dependence of the marginal likelihood on the arbitrary scaling constants of the within-model prior densities.
Dawid, A. Philip, Musio, Monica
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, 2017 Advanced Persistent Threats (APTs) are a main impendence in cyber security of computer networks. In 2015, a successful breach remains undetected 146 days on average, reported by [Fi16].With our work we demonstrate a feasible and fast way to analyse real ...
Schindler, Timo
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Concentration inequalities for Gibbs measures
, 2010 We are interested in Sobolev type inequalities and their relationship with concentration properties on higher dimensions. We consider unbounded spin systems on the d-dimensional lattice with interactions that increase slower than a quadratic. At first we
Papageorgiou, Ioannis
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Well log analysis by use of neural network.
Journal of the Japanese Association for Petroleum Technology, 1996 The present paper proposes the algorithm for well log data analysis by use of neural network.The designated network is the layered network which consists of an input layer, one hidden layer and an output layer. The unit numbers of input layer and output layer are equal to well log curve to be inputted and the lithology to be outputted, respectively ...
Yuzuru Ashida, Akira Itoh
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Straight-line programs with memory and matrix Bruhat decomposition
, 2013 We advocate that straight-line programs designed for algebraic computations should be accompanied by a comprehensive complexity analysis that takes into account both the number of fundamental algebraic operations needed, as well as memory requirements ...
Niemeyer, Alice C. +2 more
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Stock market crashes, Precursors and Replicas
, 1995 We present an analysis of the time behavior of the $S\&P500$ (Standard and Poors) New York stock exchange index before and after the October 1987 market crash and identify precursory patterns as well as aftershock signatures and characteristic ...
Bouchaud, Jean-Philippe +2 more
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The Pricing of Short-Lived Options When Price Uncertainty Is Log-Symmetric Stable [PDF]
The well-known option pricing formula of Black and Scholes depends upon the assumption that price fluctuations are log-normal. However, this formula greatly underestimates the value of options with a low probability of being exercised if, as appears to ...
J. Huston McCulloch
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